Operation
Manual
Raytek
CM
14
7.5 Right Angle Mirror
The Right Angle Mirror is used to turn the field of view by 90° against the sensor axis. It is recommended when space
limitations or excessive radiation do not allow for direct alignment of the sensor to the target. The mirror must be
installed after the bracket and after the Air Purge Collar and screwed in fully. In dusty or contaminated environments,
air purging is required to keep the mirror surface clean.
Figure10: Dimension of Right Angle Mirror
When using the Right Angle Mirror, adjust the emissivity or transmissivity settings downward by
5%. For example, for an object with an emissivity of 0.65, you adjust the value down to 0.62. Or,
you can keep the emissivity 0.65 and adjust the transmissivity from 1.0 to 0.95. This correction
accounts for energy losses in the mirror.
7.6 Protective Window
Determination of transmissivity of an unknown protective window:
If transmissivity of the measuring screen is not indicated on the data sheet, you can also determine the transmissivity
yourself. Please proceed as follows:
1.
Measure the temperature of the target object with the sensing head, without using the protective window. Note
correct setting of emissivity.
2.
Insert the protective window in the sensing head.
3.
Adjust the transmissivity in the software until the same temperature is displayed, as it was determined without
the protective window.
For more information regarding the mounting of a protective window, see 9.5 Replacing a Protective Window
on page 18.
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